868851 has 12 divisors (see below), whose sum is σ = 1321320. Its totient is φ = 548640.

The previous prime is 868849. The next prime is 868867. The reversal of 868851 is 158868.

It is not a de Polignac number, because 868851 - 2¹ = 868849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (868801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2370 + ... + 2711.

It is an arithmetic number, because the mean of its divisors is an integer number (110110).

2⁸⁶⁸⁸⁵¹ is an apocalyptic number.

868851 is a deficient number, since it is larger than the sum of its proper divisors (452469).

868851 is a wasteful number, since it uses less digits than its factorization.

868851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5106 (or 5103 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 868851 is about 932.1217731606. The cubic root of 868851 is about 95.4219824612.

The spelling of 868851 in words is "eight hundred sixty-eight thousand, eight hundred fifty-one".